Toe forming machines



21, 1958 J. D. CHANDLER EI'AL 2,856,520

TOE FORMING MACHINES Inventors James D. (Thanaler Benjamin FPar/"eZ/z' 1 t e m s a; v e m s 7 W aw. YE .q T J M a 1 w z 0 ofiw ww w m 1. fi u dw fiw J d A e 1 H Augustus D. WWI/muck Oct. 21, 1958 J. D. CHANDLER ETAL 2,856,620

TOE FORMING MACHINES Filed Jan. 14, 1957 7 Sheets-Sheet 2 lnven tors James D. Chandler Bezy'aniin FParre/[z' Augustus D. Willhauck J. D. CHANDLER ETAL TOE FORMING MACHINES Oct. 21, 1958 7 Sheets-Sheet 3 Filed Jan. 14, 1957 Inventors James D. Chandler Bery'amz'n F Par/911i Augustus D. WiZZhauc/r Oct. 21, 1958 J. D. CHANDLER ETAL I TOE FORMING MACHINES Filed Jan. 14, 1957 7 Sheets-Sheet 4 rm sl mma r arh m2 nU U mw .0 Z Emmi @5 M TOE FORMING MACHINES 7 Sheets-Sheet 5 Filed Jan. 14, 1957 n e F 0 v m 5 nmwmw fiw @m9 2 Oct. 21, 1958 J. D. CHANDLER ETAL 2,356,620

TOE FORMING MACHINES Filed Jan. 14, 1957 '7 Sheets-Sheet 6 Augustus D WU/muck /Z6' V By Mei/"Attorney a 9; M W

. i Iiwenfors p0 5 James D Chandler Tia/'9 E Belg/0min FParreZZz' 21, 1958 J. D. CHANDLER ETAL 2,856,520

TOE FORMING MACHINES Filed Jan. 14, 1957 '7 Sheets-Sheet '7 I I w i. l E? j Inventorzr hmes D. Chandler Bery'amzn FParrelli Pk, Augustus 12 Wz'llhauck TOE FORMING MACHINES James D. Chandler, Swampscott, henjamin F. Parrelli, Beverly, and Augustus D. Willhauelr, Stoneham, Mass, assignors to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application January 14, 1957, Serial No. 633,935 a 18 Claims. (Cl. 12-=53.1)

This invention relates to machines for-shaping shoe uppers and is herein illustrated inits application to machines for shaping the toe portions of shoe uppers off the last, particularly shoe uppers previously attached to insoles or sock linings. It is to be understood, however, that the invention, in certain aspects thereof, is not limited to shoe machines but is applicable to hydraulic organizations, and more particularly to hydraulic organizations in plural station machines in which operating instrumentalities in one station remain in operative position during the interval between successive cycles of the machine.

United States Letters Patent No. 2,578,756, granted December 18, 1951, on an application filed in the names of Speier et al. discloses a machine for forming the toe portion of a shoe upper previously attached to an insole or sock lining, this machine being characterized by clamping plates engaging respectively the foot facing surface and the outsole facing surface of the sock lining and being characterized further by a toe former in the form of a ram which advances toewardly into the clamped upper to impart to the toe portion of the supper a shape corresponding generally to the shape or" the toe portion of a last.

In shaping the toe portions of shoe uppers initially secured to insoles or sock linings by stitching, it is desirable to provide suitable means for obviating undue strain upon the stitching during the toe forming operation.

Accordingly, it is an object of the present invention to provide in a machine of the type illustrated in the Speier et al. patent suitable means for clamping the marginal portions of the shoe materials during the toe forming operation in order that the force applied by the upper shaping means shall not be taken by the stitching attaching the upper to the sock lining.

With this object in view, the present invention in one aspect thereof consists in the provision in a machine having inner and outer plates for gripping between them a sole attached to a shoe upper, of means for gripping the margin of the sole and the margin of the upper attached thereto against the outer clamping plate and holding the marginal material so gripped while the form or ram is actuated to shape the upper. The illustrated gripping means applies pressure locally along the line of the stitches securing the upper to the socklining thereby preventing undue strain on the stitches during the toe forming operation. In the illustrated organization the means for gripping the marginal portions of the shoe materials comprises a flexible band embracing the toe portion of the shoe assembly and means for actuating the band to clamp said marginal portions against the edge face of the plate engaging the outsole facing surface of the sock lining. In the illustrated organization the flexible clamping band, together with its actuating means, and the clamping plate which engages the outsole facing surface ofthe sock lining are mounted. on a carrier movable toward. and from a. shoe assembly States Patent mounted on the clamping plate'which engages the foot facing surface of the sock lining.

In its application to pressure fluid actuated machines for shaping shoe uppers attached to insoles or sock linable valves being provided for determining the sequence of operations of the clamping instrumentalities and the ram.

In its application to hydraulic organizations the present invention, in one aspect thereof, consists in the provivision in a plural station machine of an actuator, e. g. the piston for operating the toe shaping ram, a valve common to both stations for opening a pressure line to the actuator, and a valve in a second station which serves to impede the flow of exhaust fluid from the first station. By so impeding the flow of exhaust fluid the valve in the second station causes the actuator to be held in its advanced or operative position during the interval between successive cycles of the machine. Preferably, the machine cycle is initiated by the manual'operation of a selector valve for opening one station of the machine to the flow of pressure fluid and another station to the flow of exhaust fluid subject to the impedance, created by the valve above referred to. For overcoming said impedance and retracting the actuator in one station of the machine, a valve is provided in another station for opening a suitable pressure line in predetermined sequential relation to the operation of the instrumentalities of the machine.

The illustrated selector valve is operated by a rotary cam which is manually actuated by means such, for example, as a treadle.

These and other features of the invention will now be described with reference to the accompanying drawings and pointed out in the appended claims.

In the drawings,

Fig. l is a front elevation of a twin machine embodying the features of the present invention;

Fig. 2 is a right side elevation of the machine illustrated in Fig. 1;

Fig. 3 is a front elevation on an enlarged scale, illustrating particularly a valve operating assembly shown in Fig. 1;

Fig. 4 is a section taken substantially on the line IV-IV of Fig. 3;

Fig. 5 is a plan view on substantially the same scale as Fig. 3 illustrating the assembly shown in Fig. 3;

Fig. 6 is a right side elevation of the assembly shown in Fig. 3;

Fig. 7 is an enlarged sectional view, taken on the line VII-VII of Fig. 1, illustrating one of a plurality of duplicate valve mechanisms employed in the hydraulic organization of the illustrated machine;

Fig. 8 is a plan view on an enlarged scale illustrating certain operating instrumentalities incorporated in the illustrated machine;

Fig. 9 is a section taken on the line IX-IX of Fig. 8;

Fig. 10 is an enlarged section taken substantially on the line XX of Fig. 2;

Figs. ll, 12 and 13 are views in side elevation illustrating the operating instrumentalities with relation to a shoe in the machine at different stages in the operating and arranged to operate on a shoe assembly comprising a pre-fitted upper closed, at least at the toe end, and secured preferably by a sewn seam to an insole or seek lining. If desired, the upper may also have a platform wrapper secured thereto. Each station of the machine is provided with operating instrumentalities comprising sole shaped clamping plates which engage respectively the foot facing and outsole facing surfaces of the insole or sock lining and grip it securely in order to hold the shoe assembly against toeward movement during the operation of a ram operating within the upper to impart to its portion a shape at least approximating the form of the toe portion of the last on which the shoe assembly will be shaped. In order to protect the stitching securing the upper to the insole at its toe portion the illustrated machine is provided with a flexible band which clamps the bottom margins of the shoe upper materials at the toe end of the upper to the edge face of the sole clamping plate engaging the outsole facing surface of the sock lining.

Referring to Fig. l, the illustrated machine is provided with a station A in which a shoe upper is shown under pressure of the operating instrumentalities and a station B in which the operating instrumentalities are shown in their respective retracted positions awaiting the presentation of a shoe assembly thereto. The shoe assembly in station A remains under the pressure of the operating instrumentalities until a shoe assembly is presented to the operating instrumentalities in station B and the machine has completed the greater part of the cycle of operations in station B. At a predetermined time in the cycle of operations in station B the operating instrumentalities in station A are automatically retracted to permit the removal of the shoe assembly.

Referring to Figs. 1 and 2, the illustrated operating instrumentalities comprise a flat inner clamping plate having the peripheral shape of the toe portion of an insole and arranged in a horizontal position for engagement with the foot facing surface of the in'sole of a shoe assembly which, as shown in Fig. 11, comprises a ,pre-fitted upper 22, an insole or seek lining 24, and a platform cover or wrapper 26 secured together by a sewn seam 28 extending about the periphery of the upper approximately at the last bottom line. The clamping plate 29 is formed integrally with an angular arm 3% removably secured to a horizontal bar 32 (Fig. l). Cooperating with the clamping plate 20 is an outer clamping plate 34 (Fig. ll) constructed and arranged to engage the outsole-facing surface of the insole 24. The clamping plate 34 is one element of an assembly mounted at the upper end of an elevator shaft 36 which is moved upwardly by fluid pressure to cause the insole to be clamped between the inner clamping plate 20 and the outer clamping plate 34. In the illustrated organization the outer clamping plate is removably attached to a spacer plate 35 by a plurality of screws one of which is identified in Fig. 11 by the numeral 37. The spacer plate is secured to a base plate 39 by a plurality of screws 41. Fixed to the bottom of the base plate is a plate 124 having extending downwardly therefrom a hub 126 provided with a square opening in which is mounted the upper end portion of the elevator shaft 36 which is made square in cross section in order to prevent rotation thereof and thereby to maintain a predetermined orientation of the outer clamping plate 34 common to the orientation of the inner clamping plate 26/ Included in the assembly carried by the elevator shaft 36 is a flexible clamping element 38 for clamping the bottom marginal portions of the shoe materials to the edge face of the clamping plate 34. As herein illustrated, the clamping member 38 is a flexible steel band which, as shown in Fig. 11, has a width corresponding substantially to the width of the bottom marginal portions of the shoe materials extending downwardly from the seam 28. Also included in the assembly at the upper end of the elevator shaft 36 are operating instrumentalities hereinafter de scribed for imparting heelward movement to the opposite ends of the band 38 in order to bring it into clamping engagement with the then outer surface of the platform wrapper 26.

The illustrated ram for shaping the toe portion of a shoe upper comprises a head 40 having a contour corresponding generally to the contour of the toe end portion of a shoe last. The ram head is removably attached by screws to an upstanding crosshead 43 at the free end of an angular arm 42 fixed to a horizontal slide 44 (Figs. 1 and 2). The slide 44 is slidably mounted for horizontal movement lengthwise of a shoe assembly in the machine in a suitable guideway or groove formed in a forwardly offset head 47 of a standard 49 bolted to a crosshead 51 fixed to a base or pedestal 53. The slide 44 is held against vertical displacement from the guideway by a top plate secured by screws 57 to the offset head 47. The forward movement of the slide 44 is arrested by a stop member in the form of a lug 59 projecting downwardly from a slide 61 mounted for horizontal adjustive movement lengthwise of the shoe assembly in a suitable groove in an upward extension of the top plate 55, the slide being held against vertical displacement within the groove by a cap plate 67 secured by screws 6) to the extension 65. The stop member or lug 59 projects downwardly from the slide 61 through a slot 79 in the top plate 55 and into a groove 63 formed in the upper portion of the slide 44. The forward movement of the slide 44 is arrested by the engagement of the end wall of the groove 63 with the rear edge face of the lug 59. In order to provide for adjustment of the forward limit of movement of the ram head 40 suitable means is provided for adjusting the slide 61 in order to vary the position of the stop lug 59 lengthwise of the groove 63. In the illustrated organization an adjusting screw 71 is threaded into a tapped bore in the slide 61 and has its headed end portion journaled in a lug 73 extending upwardly from the head 47. The screw is held against longitudinal movement by the engagement of its head 75 with the forward surface of the lug 73 and by the engagement of a flange 77 formed in the shank portion of the screw with the rear face of the lug. The registration of the ram head 40 with the inner clamping plate 20 is determined by the engagement of a tongue 81 extending upwardly from the clamping plate in a suitable groove in the base of the ram head.

The elevator shaft 36 is actuated to bring the clamping plate 34 into clamping engagement with the insole of a shoe assembly mounted on the plate 20 by the hydraulic operation of a piston 46 (Fig. 10) mounted in a cylinder 48 which, as shown in Fig. 2, is secured to a fixed bracket 50 by four screws 52 extending through suitable clamping members 54 at opposite sides of the cylinder. The upper portion of the bracket 50 provides the base 56 and side walls 58 of a channel in which the elevator shaft 36 operates. A retainer plate 60 secured to the side walls 58 retains the elevator shaft in the channel. Referring to Fig. 10, .the piston rod 62 extends upwardly through a gland 64 in the upper portion of a head or valve block 66 mounted on the cylinder 48. The piston 46 is elevated by pressure fluid admitted through a port 68 in a valve block 70 at the lower end of the cylinder 48. Fluid in that portion of the cylinder above the piston is exhausted first through a port 71 in the valve block 66 and finally through a governor valve 73 communicating with the port 71. In the illustrated organization the fluid above the piston is exhausted first through a main bore 75 communicating with the port 71. During the upward movement of the piston the bore 75 is closed by the enlarged lower portion 77 of the piston rod 62 and thereafter the fluid remaining above the piston 46 is exhausted through a counter bore 79 in the base of the valve block 66 and an angularduct 81 extending from the counterborerto a chamber 83 communicating with the governorvalve73. It will be understood that the bore in the valve block 66 in conjunction with the enlarged lower portion 77 of the piston rod provides a dash pot mechanism for retarding the upward movement of the piston 46 asthe clamping plate 34 nears the insole of the shoe assembly mounted on the clampingplate 20. The governor valve 73 is adjustable by rotation of its stem to vary the rate of upward movement of the piston 46 during the final stage of its operation.

The clamping band 38 (Fig. 2) is actuated by fluid pressure entering a cylinder 74 through a port '76 to impart rearward movement to a piston 78 mounted in the cylinder. The cylinder 74 is pivotally mounted on a cross pin 106 fixed in a yoke 108 swiveled in a cylindrical head at the outer end of a bracket 112 secured to the standard 49. A piston rod extending forwardly from the piston 78 is mounted for sliding movement in abearing in a standard 122 projecting upwardly from the bracket 112. The engagement of the rod 120 in the standard determines the angular disposition of both the rod and the cylinder 74. The rod 120 has fixed to its forward end portion a vertical channel rail 80. As shown in Fig. 8, .the channel rail 80 has grooves or channels 82 in its opposite side faces in which travel rolls 84 mounted on pins 86 carried by heads at the rear ends of two slide members 88 carried by the clamping plate 34. As shown in Fig. 9, the slide members 88 have undercut tongues 90 which are mounted for sliding movement in complementally shaped grooves formed in parallel ribs 92 in the bottom of the clamping plate 34. The slide members 38 are provided with rack teeth 94 (Fig. 8) which mesh with segments 96 fixed to the lower portions of short vertical shafts 98 journaled in bearings formed in bosses 100 at opposite sides of the base plate 39. Fixed to the upper portion of each shaft 98 is a short arm 102 which has swiveled in its bifurcated free end portion a pin 104 on which is anchored one end portion of the clamping band 38.

For actuating the ram head 40 to shape the toe portion of a shoe assembly clamped between the two plates 20 and 34 a piston 128 (Fig. 2) is mounted in a cylinder 130 and has a forwardly extending piston rod 132 connected to the rear end portion of the slide44. The piston is advanced by fluid pressure entering the cylinder 130 through a port 134 in its rear end portion. The cylinder is pivotally mounted on a cross pin 136 fixed in a yoke 138 and extending through a lug 140 projecting rearwardly from the cylinder. The yoke 138 has a downwardly extending stem 142 swiveled in a cylindrical head 144 at the rear end of a bracket 146 secured to the standard 49. The piston rod 132 is mounted for sliding movement in a bore in a standard 148 projecting upwardly from the bracket 146, the engagement of the rod in the standard determining the angular disposition of both the rod and the cylinder. Spaced flanges 1511 at the forward end of the piston rod 132 engage a right angular extension 152 of the slide 44, said extension being bifurcated for engagem nt with the piston rod.

Referring to Fig. 14, the illustrated machine is actuated by fluid pressure delivered by a pump 154 and transmitted through a selector valve 156 which is manually operated to direct the flow of pressure fluid to one station .of the machine to effect the actuation of the operating instrumentalities therein and concomitantly to effect the retraction of the operating instrumentalities in the other station. The cycle of operations is so organized that the upper shaping ram in one station remains in uppershaping position after the completion of the operating cycle in that station and until the latter part of the operating cycle in the other station, thus to cause the toe portion of the upper to become permanently set to the shape of the ram before the ram is retraced. As

shown in Fig. 14, the selector valve 156 is set totransrnit pressure fluid to one of a series of sequence valves which control the operation of the instrumentalities in station A, these valves being generally identified by the letter A in Fig. 14. The sequence valves are identical in construction but are adjustable to vary the pressure at which they operate. Referring to Fig. 7, each sequence valve comprises a valve block 158 combined with a flanged stem 160 extending upwardly therefrom and a base member 162 fixed to its lower surface. The valve block is bored vertically to receive a sliding valve body or plunger 164 having an upper spool 166 and a lower spool 168. The valve block is bored horizontally to provide an upper port 170 and a lower port 172 both communieating with the vertical bore in which the valve. body slides. The valve block is bored vertically to provide a passage 174 from the port 170 to the port 172, this pas: I sage .beingnormally closed by a spring pressed valve member 176. The valve body is normally held at the limit of its downward movement as shown in Fig. 7 by a compression. spring 178, this position of the valve being determined by the engagement of the spool 168 with the upper surface of the base member 162. With the valve in this position pressure fluid entering the upper port 170 flows through the passage 174 and out through of the pressure of the spring 178 it is seated in a thimble 184 slidably mounted in a bore in the stem 160 and abutting a screw 186 which is adjustable to vary the posi tion of the thimble.

In the operation of the machine the selector valve 156 is adjusted manually to direct the flow of pressure fluid to the series of sequence valves in station A or alternatively to direct the flow of pressure fluid to a like series of sequence valves in station B. As shown in Fig. 14, the selector valve is adjusted to direct the flow of pressure fluid to station A. With the selector valve in this position pressure fluid enters the valve through a port 188 and flows out through a port 190 and through a line 192 to a sequence valve 194, entering the upper port of the valve and flowing freely through the valve and into a line 196 which communicates, through a line 197, with the lower port of a sequence valve 198 and, through a line 199, with the bottom of the piston 46 which imparts upward movement to the elevator shaft 36. The operation of the elevator shaft brings the clamping plate 3-4 into engagement with the sole of a shoe assembly which has been positioned by the operator on the inner clamping plate 20. The fluid exhausted from the upper end of the cylinder .48 flows through a line 200 and a line 201 to the upper port of a valve 202 in station B, flowing freely through said valve and through lines 2 04 and 206 to the upper port of a valve 208 and through said valve and through lines 210 and 212 to a valve 214. Exhaust fluid flows freely through the valve 214 and through a line 216 to the lower port of a valve 218 through which flows all of the exhaust from both stations. The valve 218 is adjusted to thirty pounds pressure which is suflicient to cause an impedance to the flow of exhaust fluid from station 3 thereby to hold the operating instrumentalities up to thirty pounds, fluid flows through the exhaust valve 218 and through a line 224 to the selector valve 156. Fluid enters the valve 156 through a port 258 and enters a radial bore 350 in a plunger 250. The radial bore 350 communicates with an axial bore 260 which communicates at its lower extremity with a radial bore 352. Fluid exhausted from the bore 352 passes through a port 354 to a line 230 communicating with a sump 231.

Referring again to the pressure side of the system, after fluid pressure in the line 197 has built up to approximately two hundred pounds, pressure fluid flows through the valve 198 and through service lines 220 and 221 to the piston 78 which operates the toe embracing band 38 in station A. Fluid exhausted from the cylinder 74 flows through a line 222 and the line 212 to the upper port of the valve 214 and through said valve and through a line 216 to the exhaust valve' 218. Pressure fluid flowing from the valve 198 not only actuates the piston 78 but also flows through a line 226 to the cylinder 74 in station B, retracting the piston 78 and the work engaging band 38 to release the pressure of the band on the shoe. Fluid exhausted from the cylinder 74 in station B flows through a line 228 to the upper port of the valve 214 flowing freely through said valve through the line 216 to the lower port of the exhaust valve 218. When the pressure in the system has built up to one hundred fifty pounds pressure, pressure fluid enters the lower port of a sequence valve 232 and flows through said valve to a service line 233 communicating with the cylinder 130 in which operates the piston 128 which actuates the ram 40. The fluid exhausted from the cylinder 130 is conducted through a line 234 to the upper port of the valve 208 and through the valves 208 and 214 to the exhaust valve 218. Pressure fluid flowing through the valve 232 serves not only to advance the ram operating piston 128 in station A but also to retract the companion piston 128 in station B, flowing through a line 236 to the cylinder 130 in station B. Fluid exhausted from the cylinder 130 flows through a line 237 and the line 206 to the valve 208 and through the valves 208 and 214 to the exhaust valve 218. When the pressure in the system builds up to one hundred pounds, pressure fluid flows from the valve 232 through a line 233 and a line 238 to the lower port of ,a sequence valve 240 and through said valve and service lines 241 and 242 to the cylinder 48 in station B, imparting downward movement to the piston 46 thereby to disengage the plate 34 from the shoe assembly in station B, thus permitting removal of the shoe assembly from the machine. Fluid exhausted from the cylinder 48 flows directly to the exhaust valve 218 through a line 235. After the piston 46 has come to the limit of its downward movement, pressure fluid flows from the valve 240to the lower port of a sequence valve 244 through which it flows under fifty pounds pressure into a line 246 to the sump, thus completing the cycle of the machine.

The selector valve illustrated in Fig. 14 comprises a valve block 248 having a plunger 250 mounted in a central or axial bore 252. In its position illustrated in Fig. 14 the plunger 250 is held at the limit of its upward movement by a string 254 surrounding a fixed stem 256 registering with an axial bore 268 in the plunger. After the completion of an operation in station A the plunger is manually moved downwardly in order to cause pressure fluid entering the port 188 to flow out through a port 258 into a line 224 communicating with the valve 218 in station E. The cycle of operations in station B is the same as in station A and will be understood from the description of the hydraulic cycle in station A. For imparting downward movement to the plunger 250 the illustrated machine is provided with a treadle 262 (Fig. 2) mounted to swing on a fixed fulcrum 264 at the lower end of a downward extension 266 of a crosshead 268 (Fig. 1) in the base of the pedestal 53. Midway between its ends the treadle 262 is connected by a link 270 to a lever 272 fulcrurned on a bracket 274 fixed to the extension 266. The lever 2'72 is connected by a link 276 to a lever 278 mounted on a shaft 280 mounted in a casting 282 secured to and extending downwardly from the upper portion of the pedestal 53. A reduced lower portion 284 of the casting provides amounting for the valve block 248.

The treadle is normally held elevated by a spring 286 the upper end of which is anchored to a screw eye in the upper portion of the pedestal and the lower end to a short arm 288 mounted on the shaft 280 and connected by a bridge 289 (Fig. 5) to the lever 278. The lever 278 is bifurcated to provide for the mounting of a pawl 290 on a cross pin 292 carried by the lever. The pawl cooperates with a ratchet wheel 294 (Fig. 6) freely mounted on the shaft 280. The pawl is urged in a clockwise direction, as seen in Fig. 6, into engagement with any one of four teeth formed in the ratchet wheel by a plunger 296 mounted in a longitudinal bore in the pawl and urged to the left, as seen in Fig. 6, by a spring 298 into engagement with an abutment surface 300 formed in the lever 278. Referring to Fig. 3, a hub 302 of the ratchet wheel 394 is coupled to a hub 384 of a rotary cam member 306 freely mounted on the shaft 280, and the cam member has a hub 308 projecting to the left, as seen in Fig. 3, and coupled to a hub 310 of a rotary brake member 312 freely mounted on the shaft 280. As shown in Fig. 6, the cam member 306 engages a roll 314 mounted in the bifurcated upper end portion of a stem 316 projecting upwardly from the plunger 250 (Fig. 14) through a bore in the head of the valve block 48. The operation of the cam member 306 by the depression of-the treadle 262 alternately moves the plunger 250 downwardly and releases it for upward movement by the spring 254. In order to prevent overthrow of the cam member 306 a spring pressed plunger 318 (Fig. 4) is constructed and arranged to cooperate with the brake member 312, said brake member being provided with four arcuate recesses 320 uniformly spaced about its periphery to receive the plunger. At the end of the treadle stroke one of the recesses 320 registers with the plunger 318 and a spring 322 mounted in an axial bore in the plunger depresses it into the recess. The plunger 318 is slidably mounted in a groove formed in a boss 324 (Fig. 3) projecting laterally from an arm 326 the lower portion of which is mounted on the shaft 280 and the central portion of which is bolted to a boss 328 formed in the casting 282. The plunger 318 is retained in the groove in the boss 324 by a keeper or plate 329 secured to the boss by screws 331. The upper end of the spring 322 bears against the lower end of a screw 330 mounted in a cylindrical extension 332 projecting upwardly from the offset upper end portion 334 of the arm 326. The plunger 318, acting against the brake member 312, arrests the rotation of the cam member 306 when the treadle 262 comes to the limit of its stroke and holds the cam member against further rotation until the treadle is elevated by the spring 286 to bring the pawl 290 into engagement with the next tooth of the ratchet wheel 294 and the treadle is again depressed to rotate the cam member.

If desired, means may be provided for applying heat to the toe portion of the upper during the toe forming operation. The heating means would preferably be in the form of an electric heating cartridge inserted into a suitable socket formed in the ram 40.

Having thus described our invention, what 'we claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for shaping a shoe upper attached to a sole, an inner plate constructed and arranged to engage the foot facing surface of a sole, an outer plate cooperative with the inner plate .to grip the sole, means for gripping the margin of the sole and the margin of a shoe upper attached thereto against the outer plate, and a form operable to shape an end portion of the upper.

2. In a machine for shaping a shoe upper attached to a sole, an inner plate constructed and arranged to engage the foot facing surface of a sole, an outer plate for gripping the sole against the inner plate, means for gripping the margin of the sole andthe margin of a shoe upper attached thereto against the outer plate, and a toe form tion.

assasao 3. In a machine for shaping shoe uppers, an inner plate constructed and arranged to engage the foot facing surface of a sole to which a shoe upper is secured by stitches extending through the bottom margin of the upper and the margin of the sole, an outer plate having the shape of a shoe bottom, means for actuating the outer plate to clamp the sole against the inner plate, means operating locally along the line of stitches to grip the margins of the upper and the sole against the edge face of the outer plate, and a form operable to shape an end portion of the upper.

4. In a machine for shaping shoe uppers, an inner plate constructed and aranged to engage the foot facing surface of a sole to which a shoe upper is secured by stitches extending through the bottom margin of the upper and the margin of the sole, an outer plate having the shape of a shoe bottom, means for actuating the outer plate to clamp the sole against the inner plate, means for gripping the margins of the upper and the sole along the seam line against the edge face of the outer plate, and a toe form operable lengthwise of the upper to shape its toe end portion.

5. In a machine for shaping a shoe upper attached to a sole, sole clamping means comprising an inner clamping member and an outer clamping member, a band for gripping the margin of the sole and the margin of a shoe upper attached thereto against the outer clamping member, a form, and means for actuating the form to shape an end portion of the upper.

6. In a machine for shaping a shoe upper attached to a sole, sole clamping means comprising an inner clamping member and an outer clamping member, a band for gripping the margin of the sole and the margin of a shoe upper attached thereto against the outer clamping member, a

form, means for actuating the form to shape an end portion of the upper, and means on the inner clamping member for guiding the movements of the form.

7. In a machine for shaping a shoe upper attached to a sole, clamping means including a plate constructed and arranged to engage the bottom surface of a sole, a band for clamping the margin of the sole and the margin of a. shoe upper attached thereto against the edge face of the plate, means for actuating the band, and a carrier on which the plate, the band and the actuating means are mounted.

8. In a machine for shaping a shoe upper attached to a sole, clamping means including a plate constructed and arranged to engage the bottom surface of a sole, a flexible band for clamping the margin of the sole and the margin of a shoe upper attached thereto against the edge face of the plate, means for actuating the band, a carrier on which the plate, the band and the actuating means are mounted, and means for advancing the carrier thereby to bring the plate into engagement with the sole.

9. In a machine for shaping a shoe upper attached to a sole, clamping means including a plate constructed and arranged to engage the bottom surface of a sole, a band for clamping the margin of the sole and the margin of a shoe upper attached thereto against the edge face of the plate, means for actuating the band, a slide on which are mounted the plate, the band and the actuating means, a pressure fluid actuated piston for actuating the slide thereby to bring the plate into engagement with the sole, and pressure fluid actuated means whereby the band actuating means is caused to bring the band into clamping engagement with the work.

10. In a shoe machine, a clamping member constructed and arranged to engage the bottom of a shoe sole, a clamping band constructed and arranged to operate at the periphery of the sole, pressure fluid operated means for actuating the member, pressure fluid operated means for actuating the band, and a valve for determining the sequence of operations of the member and the band.

11. In a shoe machine, a clamping member constructed and arranged to engage the bottom of a shoe sole, a clamping band constructed and arranged to operate at the periphery of the sole, a form for shaping a shoe upper attached to the sole, pressure fluid operated means for actuating the clamping member, pressure fluid operated means for actuating the band, pressure fluid operated means for actuating the mold, and means for determining the sequence of operations of the member, the band and the mold.

12. In a shoe machine, a clamping plate constructed and arrangedto engage a shoe sole, a clamping band constructed and arranged to operate at the periphery of the sole, pressure fluid operated means for actuating the plate, pressure fluid operated means for actuating the band, a valve for determining the sequence of operations of the plate and the band, and a valve for controlling the degree of pressure imparted. to the band.

13. In a two station fluid pressure actuated machine, an operating instrumentality in a first station, a piston for actuating said instrumentality, a valve common to both stations for opening a pressure line for advancing said piston, and a valve in a second station for impeding the flow of exhaust fluid from said piston.

14. In a plural station fluid pressure actuated machine, an actuator, a valve in a first station for opening a pressure line for advancing said actuator, a valve in a second station for impeding the flow of exhaust fluid from said first station, and another valve in the second station for opening a pressure line for overcoming said impedance and retracting said actuator.

15. In a two station fluid pressure actuated machine, an operating instrumentality in a first station, a piston for actuating said instrumentality, a valve for opening a pressure line for actuating said piston thereby to advance said instrumentality, manually operated means for operating said valve, a valve in a second station for impeding the flow of exhaust fluid from said piston thereby to hold said instrumentality against reaction, and another valve in the second station for overcoming the impedance and actuating said piston to retract said instrumentality.

16. In a two station fluid pressure actuated machine, an operating instrumentality in a first station, a piston for actuating said instrumentality, a valve operable to open a pressure line for actuating said piston thereby to advance said instrumentality, manually operated means for operating said valve, a valve in a second station for impeding the flow of exhaust fluid from said piston thereby to hold said instrumentality against retraction during an interval between successive cycles of the machine, and another valve in the second station for opening a pressure line to overcome said impedance and actuate said piston thereby to retract said instrumentality.

17. In a two station fluid pressure actuated machine, an operating instrumentality in each station, a piston in each station for actuating the operating instrumentality therein, a selector valve for alternately opening pressure lines to the two stations for advancing the pistons therein, manually operated means for operating the selector valve, and a valve in each station for impeding the flow of exhaust fluid from the piston in the other station.

18. In a two station fluid pressure actuated machine, an operating instrumentality in each station, a piston in each station for actuating the operating instrumentality therein, a selector valve for alternately opening pressure lines to the two stations for advancing the pistons therein, a rotary cam for operating the selector valve, manually operated means for rotating said cam, and a valve in each station for impeding the flow of exhaust fluid from the piston in the other station.

References Cited in the file of this patent UNITED STATES PATENTS 

